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Discrete Choice Analysis of Temporal Factors on Social Network Growth

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Intelligent Information Management 2024年第1期16卷 21-34页

作者： Kwok-Wai Cheung yuk Tai Siu School of Communication The Hang Seng University of Hong Kong Hong Kong China

Social networks like Facebook, X (Twitter), and LinkedIn provide an interaction and communication environment for users to generate and share content, allowin. for the observation of social behaviours in the digital world. These networks can be viewed as a collection of nodes and edges, where users and their interactions are represented as nodes and the connections between them as edges. Understanding the factors that contribute to the formation of these edges is important for studying network structure and processes. This knowledge can be applied to various areas such as identifying communities, recommending friends, and targeting online advertisements. Several factors, including node popularity and friends-of-friends relationships, influence edge formation and network growth. This research focuses on the temporal activity of nodes and its impact on edge formation. Specifically, the study examines how the minimum age of friends-of-friends edges and the average age of all edges connected to potential target nodes influence the formation of network edges. Discrete choice analysis is used to analyse the combined effect of these temporal factors and other well-known attributes like node degree (i.e., the number of connections a node has) and network distance between nodes. The findings reveal that temporal properties have a similar impact as network proximity in predicting the creation of links. By incorporating temporal features into the models, the accuracy of link prediction can be further improved.

关键词： Discrete Choice Models Temporal Factors Social Network Link Prediction Network Growth

Enantioselective iridium-catalyzed allylic substitution with a Reformatsky reagent: direct construction of β-stereogenic homoallylic esters

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Science China Chemistry 2024年

作者： Debasis Pal Kirana D.Veeranna yuk Fai Wong P.Andrew Evans Department of Chemistry Queen's University(Canada) Xiangya School of Pharmaceutical Sciences Central South University

The Reformatsky reagent derived from ethyl bromoacetate circumvents the challenge associated with the direct regio-and enantioselective iridium-catalyzed allylic alkylation with an unstabilized aliphatic ester enolate. Notably, this work represents the first example of using a Reformatsky reagent in a metal-allyl reaction, which permits the direct construction of enantioenriched β-stereogenic homoallylic esters without preactivation of the pronucleophile or post-reaction modification of the product(e.g., thermal decarboxylation of a 1,3-dicarbonyl). Moreover, the process allows the coupling of a broad range of sterically and electronically diverse electrophiles bearing aryl, heteroaryl and alkenyl derivatives, including the significantly more challenging alkyl-substituted allylic carbonates. The versatility of the ester product is exemplified by a series of functional group manipulations and the development of a concise and efficient enantioselective total synthesis of the natural product,(+)-descurainolide A. Finally, mechanistic studies indicate that the zinc enolate behaves as a soft nucleophile that undergoes outer-sphere alkylation.

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Comparing 11 early warning scores and three shock indices in early sepsis prediction in the emergency department

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World Journal of Emergency Medicine 2024年第4期15卷 273-282页

作者： Rex Pui Kin Lam Zonglin Dai Eric Ho Yin Lau Carrie Yuen Ting ip Ho Ching Chan Lingyun Zhao Tat ChiTsang Matthew Sik Hon Tsui Timothy Hudson Rainer Department of Emergency Medicine School of Clinical MedicineLi Ka Shing Faculty of Medicinethe University of Hong KongHong KongChina School of Public Health Li Ka Shing Faculty of Medicinethe University of Hong KongHong KongChina Accident and Emergency Department Queen Mary HospitalHong KongChina

BACKGROUND:This study aimed to evaluate the discriminatory performance of 11 vital sign-based early warning scores(EWSs)and three shock indices in early sepsis prediction in the emergency department(ED).METHODS:We performed a retrospective study on consecutive adult patients with an infection over 3 months in a public ED in Hong *** primary outcome was sepsis(Sepsis-3 definition)within 48 h of ED *** c-statistics and the DeLong test,we compared 11 EWSs,including the National Early Warning Score 2(NEWS2),Modified Early Warning Score,and Worthing Physiological Scoring System(WPS),etc.,and three shock indices(the shock index[SI],modified shock index[MSI],and diastolic shock index[DSI]),with Systemic Inflammatory Response Syndrome(SIRS)and quick Sequential Organ Failure Assessment(qSOFA)in predicting the primary outcome,intensive care unit admission,and mortality at different time ***:We analyzed 601 patients,of whom 166(27.6%)developed ***2 had the highest point estimate(area under the receiver operating characteristic curve[AUROC]0.75,95%CI 0.70-0.79)and was significantly better than SIRS,qSOFA,other EWSs and shock indices,except WPS,at predicting the primary ***,the pooled sensitivity and specificity of NEWS2≥5 for the prediction of sepsis were 0.45(95%CI 0.37-0.52)and 0.88(95%CI 0.85-0.91),*** discriminatory performance of all EWSs and shock indices declined when used to predict mortality at a more remote time ***:NEWS2 compared favorably with other EWSs and shock indices in early sepsis prediction but its low sensitivity at the usual cut-off point requires further modification for sepsis screening.

关键词： Sepsis Emergency department Clinical prediction rule Early warning score Shock index

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Delivering a high-quality colonoscopy service fit for the 21st century

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Artificial Intelligence in Gastrointestinal Endoscopy 2024年第3期5卷 1-8页

作者： Brian win. Kin ip Daniel Jin Keat Lee Kok Yang Tan Department of General Surgery Khoo Teck Puat HospitalSingapore 768828Singapore Department of Surgery Khoo Teck Puat HospitalSingapore 768828Singapore

Colorectal cancer(CRC)is the third most prevalent cancer *** is a concerning increase in its incidence among younger *** remains the gold standard for CRC *** the introduction of population-based bowel screening and increased public awareness,there has been a significant rise in referrals for *** providers worldwide will need to strategically evaluate how to allocate resources to adequately train the next generation of colonoscopists who will need to provide accurate endoscopic assessment and treatment for premalignant polyps and early *** review outlines the current workload challenges faced by colonoscopists whilst exploring emerging technologies such as artificial intelligence for adenoma ***,advanced endoscopic surgical techniques like endoscopic submucosal dissection are discussed.

关键词： Colonoscopy Colorectal cancer Bowel screening Polyps Adenoma

Prostate health index can stratify patients with Prostate Imaging Reporting and Data System score 3 lesions on magnetic resonance imaging to reduce prostate biopsies

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Asian Journal of Andrology 2024年第1期26卷 20-24页

作者： John Shung-Lai Leung Wai-Kit Ma Brian Sze-Ho Ho Stacia Tsun-Tsun Chun Rong Na Yongle Zhan Chi-Yuen Ng Chi-Ho ip Ada Tsui-Lin Ng Yiu-Chung Lam Division of Urology Department of SurgeryQueen Mary HospitalUniversity of Hong KongHong KongChina Division of Urology Department of SurgeryPrincess Margaret HospitalHongKongChina

We aim to evaluate prostate health index as an additional risk-stratification tool in patients with Prostate Imaging Reporting and Data System score 3 lesions on multiparametric magnetic resonance *** with biochemical or clinical suspicion of having prostate cancer who underwent multiparametric magnetic resonance imaging in two tertiary centers(Queen Mary Hospital and Princess Margaret Hospital,Hong Kong,China)between January 2017 and June 2022 were ***-magnetic resonance imaging fusion biopsies were performed after prostate health index *** who only had Prostate Imaging Reporting and Data System score 3 lesions were further stratified into four prostate health index risk groups and the cancer detection rates were *** of the 747 patients,47.3%had Prostate Imaging Reporting and Data System score 3 lesions *** detection rate of clinically significant prostate cancer in this group was 15.0%.The cancer detection rates of clinically significant prostate cancer had statistically significant differences:5.3%in prostate health index<25.0,7.4%in prostate health index 25.0-34.9,17.9%in prostate health index 35.0-54.9,and 52.6%in prostate health index≥55.0(P<0.01).Among the patients,26.9%could have avoided a biopsy with a prostate health index<25.0,at the expense of a 5.3%risk of missing clinically significant prostate *** health index could be used as an additional risk stratification tool for patients with Prostate Imaging Reporting and Data System score 3 *** could be avoided in patients with low prostate health index,with a small risk of missing clinically significant prostate cancer.

关键词： biopsy fusion biopsy magnetic resonance imaging prostate cancer prostate health index

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意义是我最珍贵的珠宝

新潮（芭珠甄选） 2024年第3期 44-53页

作者：陈谦 win.Tam(摄影) 不详

江南女子,云淡风轻。《庆余年》里的“鸡腿姑娘”与她的外表不谋而合,却似而不同。李沁在演员生涯中,跟随角色一步步成长。可贵的是,她始终不忘投人生活柔软的怀抱,不怕慢,也不怕远,为自己扎扎实实的每一步注入闪闪发光的意义。

关键词：云淡风轻扎扎实实意义

Study on the Establishment of Demonstration Site for Peatland Conservation through Integrated Management and Sustainable Utilization of Non-timber Forest Products(NTFPs)

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Journal of Agricultural Science and Technology(A) 2024年第2期14卷 93-106页

作者： Sann Lwin.Mya win.Myint Myint Khaing Tin Maung Htun Soe Min Ye Wunna Soe Forest Resource Environment Development and Conservation Association(FREDA)

A participatory action research was conducted in 2022,with the“Establishment of Demonstration Site for Peatland Conservation through Integrated Management and Sustainable Utilization of Non-Timber Forest Products(NTFPs)”to give recommendation on the development of guidelines on Sustainable Utilization of Non-Timber Forest Products(NTFPs)and peatland *** to the peat soil assessment,it was found that peat soil content was very low and top soil was thin under the mangrove forest,and Payena paralleloneura-Kan Zaw bearing forest in March *** material might be pressed by trespasser to collect Kan Zaw seed,to conduct horticulture and mining near the Kan Zaw bearing forest,or organic material might be damaged by burning with controlled fire in the previous years,under Kan Zaw trees to collect *** material might have been carried to the downwards with running water due to the heavy rainfall,with 4,700 mm/*** forest and Kan Zaw bearing evergreen forest can be assumed as“the major source of coastal peatland formation,with peat deposits eroded seawards”.It is assumed that the organic material will accumulate on top of the sands and it will lead to the formation of the peatland at coastal *** can be assumed that the accumulation of organic material found in mangrove forest and evergreen forests will promote the soil carbon storage,if we can adopt the ASEAN Policy on Zero Burning,which reflect ASEAN's commitment to controlling fires and haze,offering techniques,benefits,requirements,and challenges for implementing zero burning practices[1].Sustainable utilization of NTFP including peat and Kan Zaw-Payena paralleloneura Kurz seed was studied at demonstration sites,and it is recommended to make a trial on silvicultural system at mangrove forest and apply suitable silvicultural system such as Clear-Felling(in blocks or in alternate strips)system,Selection System,and Shelter Wood System to ensure the sustainable utilization of NTFP

关键词： Silvicultural system mangrove forest moist evergreen forest peat soil Kan Zaw-Payena paralleloneura Kurz seed

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肢端黑色素瘤的认知和早期检测

中国现代医学杂志 2024年第16期34卷 39-44页

作者： Ei Thae Mon win.粟娟鲁丽霞中南大学湘雅医院皮肤科湖南长沙410008

肢端黑色素瘤(AM)是黑色素瘤的一种亚型,病变分布于手掌、足底和甲床区域。不同人群AM的患病率存在差异,该亚型在白种人群中罕见,而在西班牙、非洲及亚洲人群中较为常见。研究表明,AM约占所有黑色素瘤患者的2%~3%。由于早期AM的临床诊... 详细信息

肢端黑色素瘤(AM)是黑色素瘤的一种亚型,病变分布于手掌、足底和甲床区域。不同人群AM的患病率存在差异,该亚型在白种人群中罕见,而在西班牙、非洲及亚洲人群中较为常见。研究表明,AM约占所有黑色素瘤患者的2%~3%。由于早期AM的临床诊断具有挑战性,且对早期AM缺乏认知这就导致AM患者在诊断时往往处于较晚期。因此,了解早期AM诊断的最新进展至关重要。AM与其他亚型皮肤黑色素瘤相比预后较差,对该疾病的早期认识也有助于制订治疗策略。该综述总结了AM的流行病学的特点、临床、皮肤镜和组织病理学特征,以期优化早期AM的检测策略提高患者的预后。

关键词：肢端黑色素瘤流行病学临床特征皮肤镜组织病理学

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立体绒织物的三维虚拟设计

染整技术 2024年第4期46卷 41-47页

作者：王靓靓 Kyaw win.Moe 陈敏之浙江理工大学服装学院浙江杭州310018 浙江理工大学国际教育学院浙江杭州310018

为了提高立体绒织物在数字时尚方面的设计效率,针对其外观效果还原的复杂性与软件设置参数调整的盲目性,提出了一种基于参数转化和图像处理的虚拟绒织物设计方法。在建立织物外观特征参数与软件设置参数对照表的基础上,构建软件设置参... 详细信息

为了提高立体绒织物在数字时尚方面的设计效率,针对其外观效果还原的复杂性与软件设置参数调整的盲目性,提出了一种基于参数转化和图像处理的虚拟绒织物设计方法。在建立织物外观特征参数与软件设置参数对照表的基础上,构建软件设置参数与绒毛结构参数的转化量表。根据织物外观特征及转化量表,利用纹理叠加、模糊处理等计算机图像技术完成二维贴图的快速生成与修改,通过style3D所拥有的毛皮渲染模块对立体绒织物进行三维建模与变化应用。结果表明:该方法利用二维贴图使立体绒织物数字化模型的外观凹凸效果更加显著,并能够快速完成模型重构,操作简易方便,准确清晰地模拟高度差明显的立体绒织物。

关键词：立体绒织物三维虚拟设计计算机图像技术纹理叠加二维贴图

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